Abstract

An analysis of 1049 QSOs and AGN from the Large Bright QSO Survey to
produce new constraints on the shape and evolutionary behavior of the
bright end of the QSO luminosity function is presented. The data
represent more than an order of magnitude improvement for redshifts in
the range of 0.2 to 3, and absolute magnitudes corresponding to apparent
magnitudes of 16.5 to 18.85. In the Large Bright QSO Survey sample, the
shape of the luminosity function changes systematically as a function of
redshift, becoming steeper at larger redshifts. Compared to current
models, the rate of evolution is less rapid over the redshift range 0.2
to 2, but continues, at a significantly reduced rate, until at least
redshift of about 3.

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